CONSOLIDATED STATEMENT OF EQUITY - 9 months ended Sep. 30, 2016 - USD ($) $ in Thousands	Series D Cumulative Redeemable Preferred Stock Preferred Stock	Series D Cumulative Redeemable Preferred Stock Cumulative dividends and distributions	Series D Cumulative Redeemable Preferred Stock	Series E Cumulative Redeemable Preferred Stock Preferred Stock	Series E Cumulative Redeemable Preferred Stock Cumulative dividends and distributions	Series E Cumulative Redeemable Preferred Stock	Series F Cumulative Redeemable Preferred Stock Preferred Stock	Series F Cumulative Redeemable Preferred Stock Cumulative dividends and distributions	Series F Cumulative Redeemable Preferred Stock	Common Stock	Additional Paid In Capital	Retained Earnings	Cumulative dividends and distributions	Noncontrolling Interest in Consolidated Joint Venture	Total
Beginning Balance at Dec. 31, 2015	$ 115,000									$ 2,076	$ 2,458,889	$ 652,704	$ (927,868)	$ 50,319	$ 2,351,120
Beginning Balance (in shares) at Dec. 31, 2015	4,600,000									207,604,391
Increase (Decrease) in Stockholders' Equity
Redemption of preferred stock	$ (115,000)										4,052		(4,052)		(115,000)
Redemption of preferred stock (in shares)	(4,600,000)
Net proceeds from sales of preferred stock				$ 115,000			$ 75,000				(6,640)				183,360
Sales of preferred stock (in shares)				4,600,000			3,000,000
Deferred stock compensation, net										$ 15	5,732				5,747
Deferred stock compensation, net (in shares)										1,482,621
Issuance of common stock distributions										$ 74	78,749				78,823
Issuance of common stock distributions (in shares)										7,422,081
Common stock distributions and distributions payable													(32,481)		(32,481)
Preferred stock dividends and dividends payable		$ (2,428)	$ (2,428)		$ (4,462)	$ (4,462)		$ (1,814)	$ (1,814)
Distributions to noncontrolling interest														(5,988)	(5,988)
Net income												101,021		5,358	106,379
Ending Balance at Sep. 30, 2016				$ 115,000			$ 75,000			$ 2,165	$ 2,540,782	$ 753,725	$ (973,105)	$ 49,689	$ 2,563,256
Ending Balance (in shares) at Sep. 30, 2016				4,600,000			3,000,000			216,509,093